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The rod and frame test is a psychophysical method of testing perception.It relies on the use of a rod and frame apparatus which uses a rotating rod set inside an individually rotatable drum, allowing an experimenter to vary the participant's frame of reference and thus test for their perception of vertical.
The GEFT was validated against the "parent" form of the test, the EFT, and the Rod-and-Frame Test (RFT) administered with the portable apparatus (PRFT). [5] [6] Since Witkin, et al. published the GEFT, other researchers have generated additional data, reporting both higher [7] [8] and lower [9] normative samples.
The test's validity then is not known. Hebb and others have written about the fragmentation phenomenon. The RFT is presented with the tilt of rod and tilt of frame in every possible order (RR, LL, RL, LR). The examinee is then asked to tell the examiner how to adjust the rod to "straight up and down like the flagpole outside."
The RFT is a difficult and time-consuming method for revealing field dependence and -independence. Witkin, therefore, developed the Embedded Figures Test (EFT). This test also measures field dependence without relying on the cumbersome Rod and Frame Test. An example of an EFT is a picture with many hidden figures which you are supposed to find.
The double Maddox rod test can also be used to assess torsion and measure cyclotropias. [7] Double Maddox rod test with trial frames. The room lights should be dimmed and only one light source should be visible; Maddox rods are placed into the trial frames, one before each eye
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The principle of the test is similar to that of double Maddox rod test. The glasses are placed in the trial frames with the striations vertical, giving rise to two horizontal line images when viewing a spotlight. If the patient has a vertical deviation, the lines will be seen one above the other.
The test may be useful as a sensitive indicator of trauma induced by brain injury to laboratory rats. [7] Alcohol markedly impairs mouse performance in the rotarod test. [8] Research using the rotarod test with various chemical agonists and antagonists may help scientists determine which components of neurons mediate the effects of chemicals. [9]